package com.github.shiqiyue.app.common.utils;

import com.fasterxml.classmate.Annotations;
import com.google.common.collect.Lists;
import org.dozer.CustomFieldMapper;
import org.dozer.DozerBeanMapper;
import org.dozer.classmap.ClassMap;
import org.dozer.fieldmap.FieldMap;
import org.dozer.loader.api.BeanMappingBuilder;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;

/***
 * 简单封装Dozer, 实现深度转换Bean<->Bean的Mapper.实现:
 * @author wenyao.wu
 */
public class BeanMapper {

    /**
     * 持有Dozer单例, 避免重复创建DozerMapper消耗资源.
     */
    private static DozerBeanMapper dozer ;


    static {
        if (dozer == null) {
            dozer = new DozerBeanMapper();
            List<String> mappingFileUrls = Arrays.asList("dozer/date.xml");
            dozer.setMappingFiles(mappingFileUrls);
        }
    }

    /**
     * 基于Dozer转换对象的类型.
     */
    public static <T> T map(Object source, Class<T> destinationClass) {
        return dozer.map(source, destinationClass);
    }

    /**
     * 基于Dozer转换Collection中对象的类型.
     */
    public static <T> List<T> mapList(Collection sourceList, Class<T> destinationClass) {
        List<T> destinationList = Lists.newArrayList();
        for (Object sourceObject : sourceList) {
            T destinationObject = dozer.map(sourceObject, destinationClass);
            destinationList.add(destinationObject);
        }
        return destinationList;
    }

    /**
     * 基于Dozer将对象A的值拷贝到对象B中.
     */
    public static void copy(Object source, Object destinationObject) {
        dozer.map(source, destinationObject);
    }
}

